Laura Lynn Cross, 36, has been indicted on three counts of sexual battery over a period allegedly spanning from Aug. 1, 2013, through Sept. 6, 2016. She was a teacher at Buchtel High School in Tallmadge, Ohio, just outside Akron.

WEWS reported that Cross apparently convinced the boy’s mother, who had custody of her son, to allow the teen to move in with Cross through a court-approved “partial parental custody” arrangement. She reportedly convinced the mother that she could “mentor” the boy.

Charges weren’t filed, however, until police learned that Cross and the boy allegedly had a baby together in 2015, WEWS reported. The boy’s father knew nothing about that until a tipster phoned him and asked him if he knew he was a grandfather, he said in the WEWS interview.

An Akron School System spokesperson said the district was unaware of the case until a WEWS investigation alerted them, but said officials are now “doing [their] own internal investigation going back to 2012 to determine what exactly happened and when it happened.”